- Endospores
  - "Yes" if the organism produces endospores
  - "No" if it does not
  - "" if unknown
- Gram stain
  - "+" (Positive)
  - "-" (Negative)
  - "" (Unknown), if no gram stain has been performed or no information about the staining results are known.
- Habitat
  - "" - it is not known where this organism grows
  - host-associated - this organism is often or obligately associated with a host organism
  - aquatic - this organism is often or obligately associated with either fresh or seawater environments
  - terrestrial - this organism is often or obligately associated with a terrestrial environment such as soil
  - specialized - this organism lives in a specialized environment like a marine thermal vent
  - multiple - the organism can be found in more than one of the above environments
- Motility
  - "Yes" means the organism has been found to be motile
  - "No" if it does not
  - "" means it has not, as of yet, been shown to be motile
- Oxygen Req.
  - "" - unknown oxygen requirements
  - aerobic - the organism can grow in the presence of oxygen and probably uses oxygen as an electron acceptor
  - microaerophilic - the organism can tolerate low levels of oxygen and probably does not use oxygen as an electron acceptor
  - facultative - the organism can grow both aerobically or anerobically
  - anaerobic - the organism grows in the absence of oxygen and utilizes alternative electron acceptors
- Pathogenic
  - "Yes" means the organism has been found to be pathogenic
  - "No" if it is not pathogenic
  - "" means that it is unknown
- Salinity
  - "" - unknown salinity requirements
  - Non-halophilic - 0-2% NaCl
  - Mesophilic - 2-5% NaCl
  - Moderate halophile - 5-20% NaCl
  - Extreme halophile - 20-30% NaCl
- Temp. range
  - "" - it is not known what temperature this organism grows at
  - cryophilic - the organism grows at -30 to -2
  - psychrophilic - the organism grows at -1 to +10
  - mesophilic - the organism grows at +11 to +45
  - thermophilic - the organism grows at +46 to +75
  - hyperthermophilic - the organism grows above +75

Definitions adapted from:
http://web.ncbi.nlm.nih.gov/genomes/static/gprj_help.html#prok_attributes and
https://www.ncbi.nlm.nih.gov/genomes/lproks.cgi/